ICD-10 X35
Non-Billable HeaderVolcanic eruption
About ICD-10-CM X35
ICD-10-CM code X35 represents Volcanic eruption. This is a non-billable header code in the External Causes of Morbidity chapter (block X35). The 2026 edition of ICD-10-CM X35 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Type 2 Excludes
Not included here, the excluded code is not part of X35, but a patient may have both conditions at the same time. Both codes may be coded together when applicable.
- tidal wave (tsunami) due to volcanic eruption (X37.41)
Coding Notes
Seven Chr Note
- The appropriate 7th character is to be added to code X35
Medicare LCD Coverage for X35
Local Coverage Determinations (LCDs) from CMS MACs that list X35 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing X35.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but X35 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with X35
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Codes Adjacent To X35
Other codes in section X30-X39 (Exposure to forces of nature).
ICD-10 X35, Billing FAQ
Is ICD-10 code X35 billable? +
No, X35 is a non-billable header code. Use a more specific child code from block X35 when submitting claims.
What codes are Type 2 Excludes for X35? +
Type 2 Excludes (may be coded together when both conditions exist): tidal wave (tsunami) due to volcanic eruption (X37.41)
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 1, 2026.
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